fix(wikipedia): broken background on some external links (catppuccin#978)

Update catppuccin.user.css

Author: hf02

styles/wikipedia/catppuccin.user.css

@@ -1308,12 +1308,16 @@
       background-image: url("data:image/svg+xml,@{svg}") !important;
     }
 
-    .mw-parser-output a.external[class="external text"][rel="nofollow"] {
+    .mw-parser-output a.external {
       @svg: escape(
         '<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12"><path fill="@{accent-color}" d="M6 1h5v5L8.86 3.85 4.7 8 4 7.3l4.15-4.16zM2 3h2v1H2v6h6V8h1v2a1 1 0 0 1-1 1H2a1 1 0 0 1-1-1V4a1 1 0 0 1 1-1"/></svg>'
       );
       background-image: url("data:image/svg+xml,@{svg}") !important;
     }
+    
+    .plainlinks a.external {
+      background: none !important;
+    }
 
     #mw-indicator-mw-helplink a {
       @svg: escape(